The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 28, 2016
Filed:
Mar. 20, 2014
Ams Ag, Unterpremstätten, AT;
Carlo Fiocchi, Belgioioso, IT;
Alessandro Carbonini, Redavalle, IT;
AMS AG, Unterpremstaetten, AT;
Abstract
In one embodiment a low-dropout regulator comprises a first differential amplifier (Nmos) to receive an input voltage (Vin), a power transistor (T) coupled to the first differential input pair (Nmos), the power transistor having an output (OUT) forming an output terminal of the low-dropout regulator to provide an output voltage (Vout) as a function of the input voltage (Vin), a second differential amplifier (Pmos) coupled to the first differential amplifier (Nmos), and a switching element (Mncut, Mncut) coupled between first and second differential amplifier (Nmos, Pmos), said switching element (Mncut, Mncut) being operated as a function of a feedback signal (Sfb) derived from the output voltage (Vout). The second differential amplifier (Pmos) is complementary to the first differential amplifier (Nmos). The low-dropout regulator is operated in one of two modes such that in a first mode the second differential amplifier (Pmos) is enabled and in the second mode the first differential amplifier (Nmos) is enabled and the second differential amplifier (Pmos) is disabled by means of the switching element (Mncut, Mncut).